My local shop suggested I remove every other leaf keeping the two top longest ones. I did this years ago and added Poly-liner between each leaf. It really soften my up.
The problem you will find is cars use a shorter spring and any other truck will have the center bolt in the wrong location. By keeping at least the top leaf, the axle will stay centered to the axle as it is now. Buy keeping the two top ones, you retain the safety of the second spring which coils around the ends of the main leaf. Any thing under these two is just support. If you are not worried about load capacity, removing leafs is a pretty easy way to soften the ride.
I am running four leafs in front and five on the rear. Mine started with 8 frt and 8 rear.
